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首页> 外文会议>2005 SPE international improved oil recovery conference in Asia Pacific >High-Permeability Carbonate Zones (Super-K) in Ghawar Field (Saudi Arabia):Identified, Characterized, and Evaluated for Gel Treatments
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High-Permeability Carbonate Zones (Super-K) in Ghawar Field (Saudi Arabia):Identified, Characterized, and Evaluated for Gel Treatments

机译：Ghawar油田（沙特阿拉伯）的高渗透性碳酸盐岩带（Super-K）：凝胶处理的识别，表征和评估

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摘要

Super-k (carbonate zones of extremely high permeability) canrnsignificantly enhance recovery per well in the Ghawar Field.rnThese zones present a challenge at the onset of normal waterrnarrival as the water contribution from these zones dominatesrnthe flow in the wellbore—causing either high water-cut orrnwater loading. As a component of the common practices inrnGhawar, water shut-off techniques such as the one describedrnin this paper present an effective mechanism to manage waterrnproduction. This research project has three objectives. Thernfirst objective is to identify and characterize super-k zones.rnThe second objective is to identify chemical blocking agentsrnthat can be placed in super-k zones without reducingrnhydrocarbon productivity. The third objective is to identify anrneffective technique to optimize the size and the placement ofrnthe chemical blocking agents.rnConcerning disproportionate permeability reductionrn(DPR), gelant treatments, that rely on the ability of the gels tornbe placed in the rock matrix adjacent to the fractures and tornreduce permeability to water much more than that tornhydrocarbons (DPR in the rock matrix); have more significantrnpotential than does application of DPR in the fracture. A highrnresidual resistance factor to oil in the fracture may shut-off oil.rnDistances of gelant penetration can be predicted byrnknowing the pressure drop and controlling the gelation time.rnGel properties for a strong gel that reduces permeability tornwater as a function of polymer concentrations can also bernpredicted. If pressure drawdown is held constant before andrnafter a treatment, calculations suggest that relatively smallrngelant volumes may be most cost-effective in our case. Therncost of water treatment, the initial water production rate, thernoil residual resistance factor, and the pressure drawdown havernstrong effects on the economic benefits derived from thisrnapproach.
机译：Super-k（具有极高渗透率的碳酸盐岩带）可以显着提高Ghawar油田的每口井采收率。这些区域在正常进水时就面临着挑战，因为这些区域的水贡献主要影响着井筒中的水流-导致高水位，减少水流负荷。作为Ghawar通用实践的组成部分，诸如本文所述的断水技术提出了一种有效的管理产水的机制。该研究项目具有三个目标。第一个目标是识别和表征超级k区。第二个目标是识别可在不降低烃生产率的情况下放置在超级k区的化学保护剂。第三个目标是确定一种有效的技术，以优化化学封闭剂的尺寸和位置。关于不成比例的渗透率降低（DPR），胶凝剂处理依赖于将凝胶撕裂在与裂缝和裂缝相邻的岩石基质中的能力。减少对水的渗透性比破坏烃类（岩石基质中的DPR）大得多；与在骨折中应用DPR相比具有更大的潜能。对裂缝中油的高残留阻力因子可能会切断油。-可以通过知道压降并控制胶凝时间来预测胶凝剂渗透的距离。-坚固的凝胶的凝胶性质也会降低聚合物的渗透水渗透率，这取决于聚合物浓度被预测如果在治疗前后压降保持恒定，则计算表明相对较小的胶凝剂体积在我们的案例中可能是最具成本效益的。水处理的成本，初始产水率，氨腈残留阻力系数和压力下降对这种方法带来的经济效益产生了强烈影响。

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